Locations and reports
Radon in Greeley, Colorado
EPA puts Weld County, where Greeley is, in Zone 1, its highest radon zone, and high results are common there: 46.0% of the 663 radon tests reported to CDC (2023) came back at or above 4 pCi/L. Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
Share at 4+ pCi/L
46.0%
7.1 pts above CO
- Weld
- 46.0%
- Colorado
- 38.9%
Weld, 10th of 38 in CO, 2023
Median result
3.5pCi/L
Below action level
- Weld
- 3.5 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of Weld's tests, 2023
Nearest county
50.0%
Morgan, 37 miles
- Morgan
- 50.0%
- Weld
- 46.0%
38 tests, 2023
EPA radon zone
Zone 1
Highest potential
- Zone 1
- 2
- 3
1 highest, 3 lowest
Weld, where Greeley is
Tests reported
663
In Weld
- Weld
- 663
- Morgan
- 38
Reported to CDC before any fix, 2023
Read a result for Greeley
Starts at Weld County's median, 3.5 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 3.5 pCi/L
Between 2 and 4 pCi/L
- Under 20 to 1.9 pCi/L
- 2 to 4consider a fix
- 4 and aboveEPA says fix it
This result is between 2 and 4 pCi/L. EPA recommends considering a fix when the level is between 2 and 4 pCi/L. Weld County's median reported result, 2023.
The data
Greeley, What is published
What is published for Greeley
Every figure for Greeley is a county's
Radon data is published by county, not by city, so for Greeley it is Weld County's: its EPA zone (Zone 1) and the 663 tests reported to CDC for 2023. Only a test tells you about one home.
About 115,073 people live in Greeley.
Greeley, Counties
The county Greeley lies in
MeasuredWeld County's EPA zone and the figures CDC publishes for it, 2023.
Weld CountyZone 1Highest predicted potential
- 46.0%
- Reported tests at or above 4 pCi/L
- 3.5 pCi/L
- Median reported result
- 663 tests
- Tests reported to CDC
- 10
- Annual years on file
Weld County ranks 10th of 38 Colorado counties with 30 or more tests for that period, 7.1 points above the 38.9% pooled across Colorado's counties, 12.6 points above the national pool of 33.4%.
Around Weld County, the county Greeley lies in, the nearest counties with a CDC figure for 2023 are Morgan County (37 miles, 50.0% of 38 tests), Adams County (47 miles, 36.6% of 1,191 tests) and Broomfield County (54 miles, 36.9% of 758 tests). Across the 8 nearest, the share at or above 4 pCi/L runs from 26.4% to 50.0%; the farthest of them, Gilpin County, is 77 miles away at 26.4%.
No business in the directory gives Greeley as its address; the Colorado list covers it. Colorado's other cities with a page of their own: Colorado Springs, Fort Collins, Grand Junction and Aurora.
The counties around Greeley
By distance from Weld County; counties with 30 or more tests.
Predicted: EPA Map of Radon Zones, by county. Measured: CDC tracking data, by county, 2023.
Greeley, Homes
Homes in Greeley
Of Greeley's 41,134 homes, 56% are detached houses, against 73% across Weld County; 22% are in buildings of five or more homes. The homes are older than Weld County's as a whole: half were built before 1984 (2000 for Weld County), and 16% date from before 1960. 61% of occupied homes are lived in by their owner (Weld County: 76%); in the rest a tenant can run a test, but a fix is the landlord's to make.
| Homes | Greeley | Weld County | Colorado |
|---|---|---|---|
| Housing units | 41,134 | 125,033 | 2,545,124 |
| Detached houses | 56% | 73% | 62% |
| In buildings of 5 or more | 22% | 11% | 22% |
| Mobile homes | 6% | 7% | 4% |
| Built before 1960 | 16% | 12% | 16% |
| Built since 2000 | 30% | 49% | 31% |
| Middle year built | 1984 | 2000 | 1987 |
| Owner-occupied | 61% | 76% | 66% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.
Local help
Greeley, Local resources
Local resources for Greeley
Who to ask in Colorado: its radon program, test kits and professionals.
- Colorado's radon programColorado Department of Public Health and Environment.Visit the program’s page(opens in a new tab)
- Free and low-cost kitsThe program says:
Order a discounted radon test kit
- Compare kits
- Professionals in ColoradoRadon testers and mitigators in Colorado, each with how its listing was checked.
The program's own words on licensing and disclosure are on the Colorado page.
What it means
Greeley, Questions
Questions about radon in Greeley
What radon zone is Greeley in?
EPA's map puts Weld County, and with it Greeley, in Zone 1, the map's highest class: a predicted county average above 4 pCi/L.
What are radon levels in Greeley?
High results are ordinary around Greeley: 46.0% of the 663 tests reported from Weld County for 2023 were at or above 4 pCi/L, the level at which EPA says to fix a home. The median reported result was 3.5 pCi/L.
Should I test my home in Greeley?
Yes. Weld County reported about 305 of its 663 tests at or above 4 pCi/L. That is above Colorado's pooled 38.9%, and ranks Weld County 10th of the 38 Colorado counties with 30 or more tests. Which homes they were, no map can say. How to test a home.
Is radon higher in the counties around Greeley?
It depends which way you go. 2 of the 8 nearest counties with a figure report a larger share than Weld County's 46.0% and 6 a smaller one: from Gilpin County (26.4%, 77 miles off) to Morgan County (50.0%, 37 miles off).
The answers use the published figures of Weld County, the county Greeley lies in.
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